Nasalization (definition)
From Scottish Gaelic Grammar Wiki
The phenomena in which a consonant or vowel becomes nasalized- (a process where the velum is lowered so that air is forced through the nose instead of the mouth). This sometimes manifests in English, or other languages as assimilation. In English the nasal consonants are n,m, and ŋ. To show that a consonant or vowel has been nasalized, it is often marked with a tilde.
